chore: be consistent with type aliases

Author: eduardomourar

codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddS3Config.java

@@ -122,8 +122,8 @@ public void addConfigInterfaceFields(
         writer.writeDocs(
                 "Whether to override the request region with the region inferred from requested resource's ARN."
                     + " Defaults to false.")
-            .addImport("Provider", "Provider", TypeScriptDependency.AWS_SDK_TYPES.packageName)
-            .write("useArnRegion?: boolean | Provider<boolean>;");
+            .addImport("Provider", "__Provider", TypeScriptDependency.AWS_SDK_TYPES.packageName)
+            .write("useArnRegion?: boolean | __Provider<boolean>;");
     }
 
     @Override

codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddUserAgentDependency.java

@@ -52,11 +52,11 @@ public void addConfigInterfaceFields(
             SymbolProvider symbolProvider,
             TypeScriptWriter writer
     ) {
-        writer.addImport("Provider", "Provider", TypeScriptDependency.AWS_SDK_TYPES.packageName);
+        writer.addImport("Provider", "__Provider", TypeScriptDependency.AWS_SDK_TYPES.packageName);
         writer.addImport("UserAgent", "__UserAgent", TypeScriptDependency.AWS_SDK_TYPES.packageName);
         writer.writeDocs("The provider populating default tracking information to be sent with `user-agent`, "
                 + "`x-amz-user-agent` header\n@internal");
-        writer.write("defaultUserAgentProvider?: Provider<__UserAgent>;\n");
+        writer.write("defaultUserAgentProvider?: __Provider<__UserAgent>;\n");
     }
 
     @Override

codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsEndpointGeneratorIntegration.java

@@ -99,11 +99,11 @@ public void addConfigInterfaceFields(
             writer.addImport("EndpointV2", "__EndpointV2", TypeScriptDependency.AWS_SDK_TYPES.packageName);
         } else {
             writer.addImport(
-                "RegionInfoProvider", null, TypeScriptDependency.AWS_SDK_TYPES.packageName
+                "RegionInfoProvider", "__RegionInfoProvider", TypeScriptDependency.AWS_SDK_TYPES.packageName
             );
             writer.writeDocs("Fetch related hostname, signing name or signing region with given region.\n"
                 + "@internal");
-            writer.write("regionInfoProvider?: RegionInfoProvider;\n");
+            writer.write("regionInfoProvider?: __RegionInfoProvider;\n");
         }
     }